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/*
* Copyright 2017 Emmanuel Vadot <manu@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <dev/mmc/bridge.h>
#include <dev/mmc/mmc_fdt_helpers.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/mmc/host/dwmmc_var.h>
#include <dev/mmc/host/dwmmc_reg.h>
#define WRITE4(_sc, _reg, _val) \
bus_write_4((_sc)->res[0], _reg, _val)
static struct ofw_compat_data compat_data[] = {
{"samsung,exynos5420-dw-mshc", 1},
{NULL, 0},
};
static int
samsung_dwmmc_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
return (ENXIO);
device_set_desc(dev, "Synopsys DesignWare Mobile "
"Storage Host Controller (Samsung)");
return (BUS_PROBE_VENDOR);
}
static int
samsung_dwmmc_attach(device_t dev)
{
struct dwmmc_softc *sc;
pcell_t dts_value[3];
phandle_t node;
int len;
sc = device_get_softc(dev);
sc->hwtype = HWTYPE_EXYNOS;
if ((node = ofw_bus_get_node(sc->dev)) == -1)
return (ENXIO);
if ((len = OF_getproplen(node, "samsung,dw-mshc-ciu-div")) <= 0)
return (ENXIO);
OF_getencprop(node, "samsung,dw-mshc-ciu-div", dts_value, len);
sc->sdr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
sc->ddr_timing = (dts_value[0] << SDMMC_CLKSEL_DIVIDER_SHIFT);
if ((len = OF_getproplen(node, "samsung,dw-mshc-sdr-timing")) <= 0)
return (ENXIO);
OF_getencprop(node, "samsung,dw-mshc-sdr-timing", dts_value, len);
sc->sdr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
(dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
if ((len = OF_getproplen(node, "samsung,dw-mshc-ddr-timing")) <= 0)
return (ENXIO);
OF_getencprop(node, "samsung,dw-mshc-ddr-timing", dts_value, len);
sc->ddr_timing |= ((dts_value[0] << SDMMC_CLKSEL_SAMPLE_SHIFT) |
(dts_value[1] << SDMMC_CLKSEL_DRIVE_SHIFT));
WRITE4(sc, EMMCP_MPSBEGIN0, 0);
WRITE4(sc, EMMCP_SEND0, 0);
WRITE4(sc, EMMCP_CTRL0, (MPSCTRL_SECURE_READ_BIT |
MPSCTRL_SECURE_WRITE_BIT |
MPSCTRL_NON_SECURE_READ_BIT |
MPSCTRL_NON_SECURE_WRITE_BIT |
MPSCTRL_VALID));
return (dwmmc_attach(dev));
}
static device_method_t samsung_dwmmc_methods[] = {
/* bus interface */
DEVMETHOD(device_probe, samsung_dwmmc_probe),
DEVMETHOD(device_attach, samsung_dwmmc_attach),
DEVMETHOD_END
};
DEFINE_CLASS_1(samsung_dwmmc, samsung_dwmmc_driver, samsung_dwmmc_methods,
sizeof(struct dwmmc_softc), dwmmc_driver);
DRIVER_MODULE(samsung_dwmmc, simplebus, samsung_dwmmc_driver, 0, 0);
DRIVER_MODULE(samsung_dwmmc, ofwbus, samsung_dwmmc_driver, NULL, NULL);
#ifndef MMCCAM
MMC_DECLARE_BRIDGE(samsung_dwmmc);
#endif
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